Indicating power distributing method, system, base station and customer terminal of MIMO system

Abstract

The invention provides a method, a system, a base station, and a user terminal to distribute an indicated power of a multi-input multi-output control system, wherein, the method comprises the following steps: a power distribution information table which is shared by users and the base station are preset in the system; a power distribution value of each user in the system and an actual down streamrank value which is shared by the base station and the users are acquired; a reference power value which is matched with the power distribution value in the power distribution information table is searched by the base station according to the power distribution value and the actual downstream rank value; a control indicated message which corresponds to the matched reference power value is sent bythe station to the corresponding user; and the corresponding reference power value is acquired through the way of searching in the power distribution table according to the control indicated message and the actual downstream rank value. The invention has the advantage of sending a power indication which is not equally distributed to the each user. Furthermore, compared with a system which equallydistributes the power, the invention gains greater performance gain.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method, system, base station, and user terminal for indicating power distribution of a multiple-input multiple-output system. Background technique [0002] Multiple-Input Multiple-Output (MIMO, Multiple-Input Multiple-Output) wireless communication technology can improve the spectral efficiency of the system without increasing the system bandwidth by configuring multiple antennas at the transmitter and receiver at the same time. The key technology of wireless transmission. In cellular wireless communication and wireless local area network systems, base stations need to communicate with multiple users at the same time, which is the so-called multi-user multiple-input multiple-output system (MU-MIMO, Multi-user Multiple-input Multiple-output). In this system, through scheduling and power allocation to appropriate users, the potential multi-user diversity of the sy...

AI Technical Summary

Problems solved by technology

[0003] At present, there are many methods for multi-user scheduling and power allocation in MU-MIMO systems, but applying these multi-user scheduling and power allocation methods to actual communication systems also involves a problem: the indication of power allocation results , in other words, that is, how to tell the user the result of the power allocation

When power indication is performed based on the average power allocation results used in the current 3GPP LTE, only average power allocation can still be achieved. Similarly, the system cannot make full use of the degree of freedom brought about by power adjustment between data streams to obtain greater performance gains

Images